Water : A Green Solvent With A Difference
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Water is a versatile green solvent that can be used for many organic reactions. It has unique physical properties like hydrogen bonding that allow it to activate both nucleophiles and electrophiles. Reactions that were traditionally carried out in organic solvents, like Diels-Alder reactions, pericyclic reactions, reactions of carbanions/carbenium ions, radical reactions, and multicomponent reactions, have been shown to proceed faster or with better selectivity in water compared to organic solvents. The use of water as a solvent provides advantages such as environmental friendliness, safety, and cost effectiveness.
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Water makes up 65-70% of the human body. It has unique properties like high melting and boiling points due to hydrogen bonding between water molecules. The bent shape of water molecules gives them a partial positive and negative charge, allowing them to form hydrogen bonds with other water molecules. These bonds contribute to water's high heat capacity and heat of vaporization. Water's pH measures the concentration of hydronium ions, with values below 7 indicating acidity and above 7 indicating alkalinity. pH is important in biological and chemical systems and can be measured using indicators, meters, and the Henderson-Hasselbalch equation.
Bt 202 water
This document provides an overview of biochemistry by discussing the properties of water and its importance for life. It notes that water is a polar molecule that can form hydrogen bonds, giving it unique properties like high heat capacity and surface tension. These hydrogen bonds allow water to dissolve many polar substances. Water's hydrogen bonding and ability to dissolve biomolecules make it essential as the universal solvent for living organisms. The document also briefly discusses solutions, solutes, solvents, and how water interacts with charged and nonpolar compounds.
Water and it's life giving properties
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2) The polarity and hydrogen bonding of water allow it to be an excellent solvent for dissolving many polar and ionic substances.
3) Ice floats on water because it has a lower density than liquid water, which prevents bodies of water from freezing solid.
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Water plays a primary role as a solvent in biomaterials, dissolving both inorganic salts and large organic molecules with nearly equal efficiency. As the majority component of most living organisms, water is the first molecule to contact biomaterials in clinical applications. Water's unique properties are due to its ability to self-associate through hydrogen bonding networks, allowing it to dissolve many solutes and participate actively in biological processes. The behavior of water near surfaces and its role in biology are important topics in biomaterials science given water's interactions with biomaterials and influence on their biocompatibility.
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4043247.ppt biochemistry of water & electrolyte
This document provides an overview of key concepts regarding water and its importance in biochemistry. It discusses water's unique physical and chemical properties, including its molecular structure and ability to form hydrogen bonds. This allows water to have high boiling and melting points and act as a universal solvent. The document also covers water's roles as a solvent, including hydrophilic and hydrophobic interactions. It describes noncovalent bonds like ionic interactions, hydrogen bonds, and van der Waals forces that are important for molecular interactions in water. Key properties of water like its thermal properties, osmotic pressure, and role in acid-base reactions are also summarized.
Properties of water and aqueous solutions
Akhuwat Faisalabad Institute Of Research Science and
Technology.....
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IB Biology 2.2 Slides: Water
Water's unique properties are due to its polar nature and ability to form hydrogen bonds between molecules. This allows water to have high cohesive and adhesive forces, giving it properties like surface tension and capillary action. Its polarity also allows water to be an excellent solvent. Water has a high specific heat capacity and heat of vaporization due to the energy required to break hydrogen bonds, giving it high thermal buffering abilities. Substances can be hydrophilic (water-loving) if polar or ionic, allowing dissolution, or hydrophobic. In the body, glucose and ions are water soluble and transported in blood plasma, while fats and gases require transport via other mechanisms due to low solubility. Water's properties make it perfectly
WATER QUALITY ASSESSMENT AND POLLUTION CONTROL.ppt
Solvent properties of water; principles of physico-chemical analysis, major ionic components of natural water. Chemistry of natural waters, water quality requirements, standards for potable water, irrigation and livestock. Types of water, lithological control of surface and ground water
Chapter 2: Water, the unique solvent of life
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